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IBM's second generation of personal computers. The PS/2 series introduced three advances over the PC series: 3.5" 1.44 megabyte microfloppy disks, VGA and 8514 graphics display standards, and the Micro Channel bus architecture. The 3.5" disks and VGA can be easily installed on other PCs and will become the standard for new compatible computers. The Micro Channel bus allows for multiprocessing and less aggravation, but cannot be retrofitted to older PCs.

PS/2 models 25 and 30 are ISA, other models have Micro Channel and ESDI.